Centos7安装并配置mysql5.7完美相关教程

1、配置YUM源

下载mysql源安装包

shell> wgethttp://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm

安装mysql源

shell> yum localinstall mysql57-community-release-el7-8.noarch.rpm
检查MySQL源是否安装成功
shell> yum repolist enabled | grep “mysql.-community.”
2、安装MySQL
shell> yum install mysql-community-server
3、启动MySQL服务
shell> systemctl start mysqld
查看MySQL的启动状态
shell> systemctl status mysqld

4、开机启动
shell> systemctl enable mysqld
shell> systemctl daemon-reload

5、修改root本地登录密码
grep ‘temporary password’ /var/log/mysqld.log
mysql -uroot –p+生产的密码

注意：mysql5.7默认安装了密码安全检查插件（validate_password），默认密码检查策略要求密码必须包含：大小写字母、数字和特殊符号，并且长度不能少于8位。否则会提示ERROR 1819 (HY000): Your password does not satisfy the current policy requirements错误，如下图所示：

ALTER USER ‘root’@’localhost’ IDENTIFIED BY ‘MyNewPass4!’;
set password for ‘root’@’localhost’=password(‘MyNewPass4!’);
通过msyql环境变量可以查看密码策略的相关信息：
mysql> show variables like ‘%password%’;
6、添加远程登录用户
默认只允许root帐户在本地登录，如果要在其它机器上连接mysql，必须修改root允许远程连接，或者添加一个允许远程连接的帐户，
mysql> GRANT ALL PRIVILEGES ON.TO ‘*’@’ localhost’ IDENTIFIED BY ’ MyNewPass4!’ WITH GRANT OPTION;

GRANT ALL PRIVILEGES ON.TO ‘*’@’Spark’ IDENTIFIED BY ’ MyNewPass4!’ WITH GRANT OPTION;

7、配置默认编码为utf8

修改/etc/my.cnf配置文件，在[mysqld]下添加编码配置，如下所示：
[mysqld]
character_set_server=utf8
init_connect=’SET NAMES utf8’

默认配置文件路径：
配置文件：/etc/my.cnf
日志文件：/var/log//var/log/mysqld.log
服务启动脚本：/usr/lib/systemd/system/mysqld.service
socket文件：/var/run/mysqld/mysqld.pid